<template>
  <div class="container">
    <transition :name="transitionName">
      <router-view class="view"></router-view>
    </transition>

    <router-view name="footer"></router-view>
  </div>
</template>



<script>
export default {
  name: "App",
  data() {
    return {
      transitionName: ""
    };
  },
  watch: {
    //使用watch 监听$router的变化
    $route(to, from) {
      //如果to索引大于from索引,判断为前进状态,反之则为后退状态
      if (to.meta.index > from.meta.index) {
        //设置动画名称
        this.transitionName = "slide-left";
      } else {
        this.transitionName = "slide-right";
      }
    }
  }
};
</script>

<style lang="scss">
@import "@/lib/reset.scss";
.container {
  @include rect(100%, 100%);
  @include flexbox();
  @include flex-direction(column);
  position: relative;
  .box {
    @include flex();
    @include rect(100%, auto);
    @include overflow(auto); // 部分浏览器需要加
    @include flexbox();
    @include flex-direction(column);
    .header {
      @include rect(100%, 0.44rem);
      @include color(#fff);
      @include font-size(18px);
    }
    .content {
      @include flex();
      @include rect(100%, auto);
      @include overflow(auto);
    }
  }
  .slide-right-enter-active,
  .slide-right-leave-active,
  .slide-left-enter-active,
  .slide-left-leave-active {
    will-change: transform;
    transition: all 500ms;
    position: absolute;
  }
  .slide-right-enter {
    opacity: 0;
    transform: translate3d(-100%, 0,0);
  }
  .slide-right-leave-active {
    opacity: 0;
    transform: translate3d(100%,0,0);
  }
  .slide-left-enter {
    opacity: 0;
    transform: translate3d(100%,0,0);
  }
  .slide-left-leave-active {
    opacity: 0;
    transform: translate3d(-100%, 0,0);
  }
}
</style>

